Improvement in anchors



. Stinitcd dif" CARL WILHELM ROEDEN, OF SAN FRANCISCO, CALIFRNIA.

Leners Patent No. 84,304, dated November 24, 186s. i

IMPROVEMENT IN ANCI-IORS.

The' Schedule referred to in these Letters Patent and making part of the same.

To all whom 'it may concern:

of constructing ships anchors, whereby certain ativan-- tages are obtained, which render them better adapted for the purposes for which they are intended than are others belonging to the same class of designs of which the inventor is aware.

Before entering into a detailed description of the design and manner of construction of this, my improved anchor, I will first make preface with a few remarks, with a view of more particularly directing attention to those improvements which- I claim to have made, and the advantages occurring to their credit, so that a proper appreciation of the merits and intelligent understanding of the construction of my device may be the more thoroughly conveyed.

In all swinging anchors known to the inventor, an attachment ofthe arms to the shank is made by means ofa pivot-bolt passing through the crown and base of the shank, and thus an appreciable weakening of both anchor-arms and shank occurs, whilst the fulcrum-pin or bolt itself is not, by any means, the strongest form of securing the arms to the shank.

Again, swinging anchors of the old construction are invariably made with both arms and lukes or palms in one solid forging, which, in great anchors, must necessarily, to some extent, render their solidity and freedom from flaws a matter of no easy attainment, whilst, inthe process of manufacturing, the handling of great heavy masses of iron is attended with great labor, and requiringextraordinary facilities, necessarily increases the difficulties of forging and expenses of production,

and the final accomplishment of a piece of well-finished and reliable workmanship a task of oftentimes great diiiculty.-

My invention obviates the disadvantages above referred to, inasmuch 'as its manner of construction provides greater strength to its'parts,'gives greater facility for manufacturing, and may be produced with greater reliability upon its perfect forging.

"I will now enter into a descriptionvof the construcltion and operation of my invention, to enable others tothoroughly understand it. f

`In forming my shank A, I- do not .differ from the common known methods of providing for the attachment of the chain-cables; and the shackles, shackle-pin, stock, guard-bows, &c not in any respects differing in their manner of construction from others known and in common use, lI will not enter into any unnecessary description of them.

arate and' distinct pieces, or split, as it were, longitudinally through the centre, andafterwards join and secure them together by` strong rivets or bolts, F.

The main iiukes C O, and auxiliary flukes D, (common and known provisions,)'are solid with or attached to but one-halfofthe split arms, or it may be, if desired,

that they should be divided or halved in continuation with the arms.

A proper space or slot is left between the arms, tc

admit the necessary play when swinging on the shank,

(shown in dotted lines, iig. 1,) and a tongue and groove is provided in the joint ofthe arms, to relieve the connecting rivets F from any strain which might occur.

The manner of pivoting the arms to the stock is by lmeans of steel balls, G, working in recesses provided for them in the shank and arms. v

At the base of the shank, and where the arms attach, (and, in swinging, they may overlapthe shank,) the shank is thinned downY to at least one-half its thickness, above and below, thereby formingv shoulders, against which the arms will bear.

Now, it is against the shoulders, formed at the base ofthe shank at H, that the strain of the arms is intended to come when the anchor is in use, the additional projections on the shank, at lI I, fitting into,l

notches or grooves provided in the arms at K K, assisting, to some extent, to bear this strain.

The notches at K K, cut in the arms, are made tapering, in such a manner'as that no corners may occur for the lodgment of sand or dirt, which might obstruct and prevent the entrance of the projecting'lugs I I.

Though this particular last above-mentioned 'device for .taking up a portion of the strain from the thin and consequently weakest part ofthe shank, is here speci-` fied, still the inventor is aware of other and perhaps as effective means of applying the principle involved therein; as, for instance, instead of the projections provided on the shank, and the corresponding notches for their reception being cut in the arms, I might bend the dukes Ain such a manner as that they would unclasp the shank, and rest on lugs or projections, forged on the shank; `or I might make a single lug, pin, or projectioh on either side of the shank, whichwould insert itself into a slot or cavityin the arm, orin other of many simple known ways apply the principle involved. AThis last-mentioned principle, and its mode of being vcarried into eiiect, I do not claim 'as new; but I adopt it in the construction, of my anchors when great'strength is needed, although my anchor would be complete without its use.

I will explicitly state that what I claim as my invention, and desire to secure by.Letters Patent, is-' 1. An anchor, constructed with its duke-arms B di-` vided in two pieces, and attached to the shank A, as described.l

2. The use of metal balls G, as a means of pivoting the arms on the shank, the whole as herein-described,

-vandfor the purposes as set forth.

CARL' WILHELM ROEDEN'. Witnesses GEORGE Penny, H. Annie/Ks, Jr. 

